Total recall

Rainbow fish have good memories

source: New Scientist October 6 2001 p27

Research on Australian crimson spotted rainbowfish has found that they are able to remember an escape route 11 months after they learnt it. The research was carried out by Edinburgh University’s Culum Brown, who used a trawl net in a tank to simulate a predator. The fish could only escape through the middle, where there was a hole in the net. Their memory of the escape route was almost as good when they were tested 11 months afterwards, and these fish only live for under two years.